Fan with local heat preservation structure

Abstract

The utility model discloses a fan with a local heat preservation structure, which comprises a fan casing and a motor, an output shaft of the motor is connected with an impeller hub of the fan casing, a heat preservation base is arranged on the side face of the fan casing close to the motor, a mounting hole is arranged on the heat preservation base, and the impeller hub is arranged in the mounting hole in a penetrating mode. A plurality of layers of asbestos rubber plates are arranged in the mounting hole, the impeller hub is sleeved with the asbestos rubber plates, the heat preservation base is filled with heat preservation cotton, and the asbestos rubber plates are wrapped with the heat preservation cotton. The utility model has the beneficial effects that the sealing and heat insulation of the joint of the fan casing and the motor are realized, the leakage of hot air in the fan can be prevented, the conduction of heat on the close-range fan casing to the motor can be prevented, the overtemperature of a motor bearing of the motor caused by the leakage of the hot air in the fan is prevented, the motor bearing is prevented from being influenced by the overtemperature, and the service life of the motor is prolonged. The service lives of the motor bearing and the motor are prolonged; the local heat preservation structure is small in size, small in occupied space and convenient to install.

Description

Technical Field

[0001] This utility model relates to the field of high-temperature fan technology, specifically a fan with a local insulation structure. Background Technology

[0002] In the non-ferrous metals industry, exhaust fans with temperature requirements generally use belt drives and double-layer casing insulation to prevent overheating of the fan bearings. However, in some projects, insufficient on-site installation space necessitates the use of A-type direct-drive fans to save space and ensure that the high-temperature gas inside the fan does not cause overheating of the motor bearings. However, because the impeller of an A-type direct-drive fan is directly connected to the motor, and the motor is close to the fan interior and casing, the high-temperature gas inside the motor casing can easily cause overheating of the motor bearings when the fan is running at a certain temperature. This overheating occurs through short-distance heat conduction, ultimately shortening the bearing's lifespan. For example, a fan shaft end insulation structure disclosed in patent publication number CN214304462U achieves insulation by installing insulation cotton and asbestos boards on the fan casing side plate. However, according to its specification... Figure 1 It is known that the installation structure of the insulation cotton and asbestos board has only one ring of limiting plate. The connection between the limiting plate and the side plate of the fan casing should be welded on. Its firmness is affected by the vibration when the fan is rotating, which poses a certain risk. At the same time, the installation of this insulation structure is inconvenient. Utility Model Content

[0003] The purpose of this invention is to provide a fan with a localized insulation structure to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a fan with a localized insulation structure, comprising a fan housing and a motor, wherein the output shaft of the motor is connected to the impeller hub of the fan housing, an insulation base is provided on the side of the fan housing near the motor, the insulation base is provided with mounting holes, the impeller hub passes through the mounting holes, several layers of asbestos rubber sheets are provided in the mounting holes, the asbestos rubber sheets are sleeved on the impeller hub, insulation cotton is filled in the insulation base and the insulation cotton covers the asbestos rubber sheets, a cooling fan wheel is sleeved on the output shaft of the motor, and the cooling fan wheel is located on the side of the insulation base away from the fan housing.

[0005] In a further preferred embodiment, a pressure plate is provided on the side of the asbestos rubber sheet away from the fan casing, and the fan casing, the asbestos rubber sheet and the pressure plate are connected by bolts to fix the asbestos rubber sheet.

[0006] In a further preferred embodiment, a cover plate is provided on the side of the insulation cotton away from the asbestos rubber sheet, and the fan casing, insulation base, insulation cotton and cover plate are connected by bolts to fix the insulation cotton.

[0007] Further preferred, the insulation base is an integrally bent and formed structure, which is simple and easy to process; the planar dimension of the mounting hole is larger than the corresponding planar dimension of the asbestos rubber sheet, allowing the asbestos rubber sheet to deform.

[0008] Further preferably, the cooling impeller includes a cooling impeller hub and cooling impeller blades. The cooling impeller hub is sleeved on the output shaft of the motor, and there are at least two cooling impeller blades, which are evenly distributed on the side of the cooling impeller hub. The cooling impeller hub enables the installation of the cooling impeller blades. When the output shaft of the motor rotates, the cooling impeller hub drives the cooling impeller blades to rotate synchronously, generating cooling air.

[0009] Further preferably, the cooling fan blade plate is provided with several balance holes, which are round holes that can balance axial force and generate strong wind, thus achieving the effect of blowing air and dissipating heat.

[0010] Further preferably, the side of the cooling fan hub has a reinforcing rib, which is set along the side of the cooling fan blades near the motor to improve the installation firmness of the cooling fan blades; the thickness of the reinforcing rib of the cooling fan hub is greater than that of the cooling fan blades, which can block the cooling air generated by the rotation of the cooling fan blades and direct it towards the cooling fan hub.

[0011] Further preferred, the asbestos rubber sheet is two layers, each layer of which is 5mm thick, providing better heat insulation and thermal insulation effects.

[0012] Beneficial effects: This utility model discloses a fan with a localized insulation structure. Through the insulation base and the asbestos rubber sheet and insulation cotton installed inside, it achieves a sealed and heat-insulating connection between the fan casing and the motor. This prevents hot air from leaking out of the fan and prevents heat from the nearby fan casing from being conducted to the motor. It also prevents the motor bearings from overheating due to hot air leakage from the fan, ensuring that the motor bearings are not affected by overheating and extending the service life of the motor bearings and the motor. The cooling impeller rotates synchronously with the fan, generating cooling air to blow heat away from the impeller hub, fan casing, and cover plate, further preventing heat transfer from the fan to the motor. This localized insulation structure is set between the fan casing and the motor. The entire structure is small in size, occupies little space, is easy to install, and is firmly installed. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a fan with a localized heat insulation structure disclosed in an embodiment of the present invention.

[0014] Figure 2 A partial cross-sectional view of a fan with a localized insulation structure disclosed in this embodiment of the utility model.

[0015] Figure 3 for Figure 2 A magnified structural diagram of point A in the middle.

[0016] Attached reference numerals: 1-fan casing, 2-motor, 3-impeller hub, 4-cooling impeller, 41-cooling impeller hub, 42-cooling impeller blade, 43-balance hole, 5-insulation base, 51-mounting hole, 6-asbestos rubber sheet, 7-pressure plate, 8-insulation cotton, 9-cover plate. Detailed Implementation

[0017] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0018] like Figure 1-3 As shown, a fan with a localized insulation structure is provided on the side of the fan casing 1 near the motor. This localized insulation structure prevents heat from the nearby fan casing 1 from being conducted to the motor 2, prevents hot air leakage from the fan from causing overheating of the motor bearings of the motor 2, ensures that the motor bearings are not affected by overheating, and extends the service life of the motor bearings and the motor 2. The fan includes a fan casing 1 and a motor 2. The output shaft of the motor 2 is connected to the impeller hub 3 of the fan casing 1. An insulation base 5 is provided on the side of the fan casing 1 near the motor 2. The insulation base 5 has mounting holes 51. The impeller hub 3 passes through the mounting holes 51. Several layers of asbestos rubber sheets 6 are provided in the mounting holes 51. The asbestos rubber sheets 6 are fitted onto the impeller hub 3. Insulation cotton 8 is filled in the insulation base 5 and covers the asbestos rubber sheets 6. The asbestos rubber sheet 6 and the insulation cotton 8 form an insulation layer, achieving a sealed and heat-insulating connection between the fan casing 1 and the motor 2, preventing hot air from leaking out of the fan. The insulation base 5 is used to install the asbestos rubber sheet 6 and the insulation cotton 8 between the fan casing 1 and the motor 2. The entire structure is small in size, occupies little space, and is easy to install. The mounting hole 51 is provided for the installation of the asbestos rubber sheet 6, ensuring that the asbestos rubber sheet 6 can adhere to the fan casing 1, providing localized heat insulation for the area of ​​the fan casing 1 near the impeller hub 3 and the impeller hub 3. The asbestos rubber sheet 6 has good heat resistance, and combined with the insulation cotton 8 covering the outside of the asbestos rubber sheet 6, it can effectively ensure the heat insulation effect.

[0019] In this application, a cooling fan wheel 4 is fitted onto the output shaft of the motor 2, and the cooling fan wheel 4 is located on the side of the insulation base 5 away from the fan housing 1. That is, by setting up the cooling fan wheel 4, it can rotate synchronously with the output shaft of the motor 2, thereby generating cooling air. The cooling fan wheel 4 can blow air onto the impeller hub 3 and the cover plate 9, carrying away some of the heat from the impeller hub 3 and the cover plate 9, thus cooling the impeller hub 3 and the cover plate 9. This also prevents heat from being transferred to the motor 2, further preventing the motor 2 and its bearings from overheating.

[0020] In this application, a pressure plate 7 is provided on the side of the asbestos rubber sheet 6 away from the fan housing 1. The fan housing 1, the asbestos rubber sheet 6 and the pressure plate 7 are connected by bolts. That is, the pressure plate 7 and the bolts are used to fix several layers of asbestos rubber sheet 6 to the fan housing 1. The pressure plate 7 can ensure the effective locking of the bolts and ensure the installation and fixation of the asbestos rubber sheet 6. The asbestos rubber sheet 6 will not fall off or separate from the fan housing 1 due to the vibration generated when the fan is rotating.

[0021] In this application, a cover plate 9 is provided on the side of the insulation cotton 8 away from the asbestos rubber sheet 6. The fan casing 1, the insulation base 5, the insulation cotton 8 and the cover plate 9 are connected by bolts. That is, the insulation cotton 8 is fixed by the cover plate 9, the bolts and the insulation base 5. The insulation cotton 8 is pressed onto the pressure plate 7 and the asbestos rubber sheet 6 by the cover plate 9, which has a good heat insulation effect. It can prevent heat from being transferred to the motor 2 through the insulation base 5, the asbestos rubber sheet 6, the pressure plate 7 and the impeller hub 3, and will not cause the insulation cotton 8 to fall off or separate from the asbestos rubber sheet 6 due to the vibration generated when the fan is rotating.

[0022] In this application, the insulation base 5 is an integrally bent and formed structure, which facilitates the processing of the insulation base 5. It is made of steel, which has high structural strength and long service life. The planar size of the mounting hole 51 is larger than the corresponding planar size of the asbestos rubber sheet 6, which facilitates the installation of the asbestos rubber sheet 6. At the same time, it allows the asbestos rubber sheet 6 to deform due to heat, which can effectively ensure the stability of the local insulation structure.

[0023] In this application, the cooling impeller 4 includes a cooling impeller hub 41 and cooling impeller blades 42. The cooling impeller hub 41 is sleeved on the output shaft of the motor 2, and there are at least two cooling impeller blades 42, which are evenly distributed on the side of the cooling impeller hub 41. That is, the cooling impeller hub 41 is mounted on the output shaft of the motor 2 for mounting the cooling impeller blades 42. When the output shaft of the motor 2 rotates, the cooling impeller hub 41 drives the cooling impeller blades 42 to rotate, thereby generating cooling air.

[0024] In this application, the fan blade plate 42 is provided with a number of balance holes 43. The balance holes 43 are round holes used to balance the axial force and generate a strong wind, which can achieve the effect of blowing air and dissipating heat.

[0025] In this application, the side of the cooling fan hub 41 is extended with reinforcing ribs, which are arranged along the side of the cooling fan blade 42 near the motor 2. The reinforcing ribs ensure the installation firmness of the cooling fan blade 42. The thickness of the reinforcing ribs of the cooling fan hub 41 is greater than that of the cooling fan blade 42, which can guide the airflow generated when the cooling fan blade 42 rotates, so that the cooling air blows towards the impeller hub 3 and the cover plate 9, thereby achieving airflow and heat dissipation for the impeller hub 3 and the cover plate 9 and protecting the motor 2.

[0026] In this application, the asbestos rubber sheet 6 is in two layers, each layer of asbestos rubber sheet 6 is 5mm thick. The double-layer asbestos rubber sheet 6 can enhance the heat insulation effect, ensure the heat insulation effect of the local heat insulation structure, and better prevent hot air inside the fan from leaking to the motor 2 and the motor bearing.

[0027] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A fan with a localized heat insulation structure, comprising a fan casing (1) and a motor (2), wherein the output shaft of the motor (2) is connected to the impeller hub (3) of the fan casing (1), characterized in that: A heat-insulating base (5) is provided on the side of the fan housing (1) near the motor (2). The heat-insulating base (5) is provided with mounting holes (51). The impeller hub (3) passes through the mounting holes (51). Several layers of asbestos rubber sheets (6) are provided in the mounting holes (51). The asbestos rubber sheets (6) are fitted on the impeller hub (3). The heat-insulating base (5) is filled with heat-insulating cotton (8). The heat-insulating cotton (8) covers the asbestos rubber sheets (6). A cooling fan wheel (4) is fitted on the output shaft of the motor (2). The cooling fan wheel (4) is located on the side of the heat-insulating base (5) away from the fan housing (1).

2. A fan with a localized heat insulation structure according to claim 1, characterized in that: A pressure plate (7) is provided on the side of the asbestos rubber sheet (6) away from the fan casing (1), and the fan casing (1), asbestos rubber sheet (6) and pressure plate (7) are connected by bolts.

3. A fan with a localized heat insulation structure according to claim 1, characterized in that: The side of the insulation cotton (8) away from the asbestos rubber sheet (6) is provided with a cover plate (9), and the fan casing (1), insulation base (5), insulation cotton (8) and cover plate (9) are connected by bolts.

4. A fan with a localized insulation structure according to claim 1, characterized in that: The heat-insulating base (5) is an integrally bent structure, and the planar dimension of the mounting hole (51) is larger than the corresponding planar dimension of the asbestos rubber sheet (6).

5. A fan with a localized insulation structure according to claim 1, characterized in that: The air cooler (4) includes an air cooler hub (41) and air cooler blades (42). The air cooler hub (41) is sleeved on the output shaft of the motor (2). There are at least two air cooler blades (42), which are evenly arranged on the side of the air cooler hub (41).

6. A fan with a localized insulation structure according to claim 5, characterized in that: The air impeller blade (42) is provided with a number of balance holes (43), and the balance holes (43) are round holes.

7. A fan with a localized insulation structure according to claim 6, characterized in that: The side of the air cooler hub (41) has a reinforcing rib that is arranged along the side of the air cooler blade (42) near the motor (2). The thickness of the reinforcing rib of the air cooler hub (41) is greater than that of the air cooler blade (42).

8. A fan with a localized insulation structure according to claim 1, characterized in that: The asbestos rubber sheet (6) consists of two layers, each layer of which is 5 mm thick.

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